( mouse )

:dev/r fff8 ( std read port )
:dev/w fff9 ( std write port )

|0100 @RESET 
	
	#02 =dev/r ( set dev/read mouse#02 )
	#01 =dev/w ( set dev/write screen#01 )

BRK

|c000 @FRAME

	( get mouse button, or break )
	#04 IOR
	#01 NEQ
	BRK?
		
	( paint a white pixel )
	#01 #01 
	,getmouse JSR
	,putpixel JSR

BRK

@getmouse
	#00 IOR2 ( get mouse x )
	#02 IOR2 ( get mouse y )
	RTS

@putpixel 
	IOW2 ( y short )
	IOW2 ( x short )
	IOW ( color byte )
	IOW ( redraw byte )
	RTS

|d000 @ERROR BRK 
|FFFA .RESET .FRAME .ERROR